“Polystyrene cannot be recycled like a lot of other products, so while that cup of coffee may be finished, the Styrofoam cup it was in is not,” Mills said in a statement to CNN affiliate WMTW. “In fact, it will be around for decades to come and eventually it will break down into particles, polluting our environment, hurting our wildlife, and even detrimentally impacting our economy.”

Maine is the first state to enact such a ban, CNN reported. Several communities in Maine, including its most populous city, Portland, already have local ordinances banning foam food and beverage containers, The Press Herald reported.

Maryland’s Legislature has approved bills that would ban polystyrene, but it’s unclear whether Republican Gov. Larry Hogan will sign them into law.